.clearfix::after {
    content: "";
    display: block;
    clear: both;
}

.add{
    border:1px solid black;
    padding: 10px;
    width: 250px;
    margin: 200px auto;
}

.container .add p{
    font-weight: bold;
}

.container .add div{
    margin: 5px 0;
}

.container .add div span{
    float: left;
}

.container .add div input{
    float: right;
    width: 75%;
}

.container .add .submit{
    text-align: center;
}